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YouPorn, one of the world's most popular porn video websites and one of the top 100 websites of any kind in the world, appears to have been caught with its pants down - after a list of many of its users' email addresses, passwords and dates of birth were left exposed on a public-facing server.

According to security blogger Anders Nilsson, the credentials of well over a million YouPorn users were publicly accessible.

Unlike the recent Brazzers porn site hack, however, sloppy practices are being blamed for the YouPorn incident, with debug data about users seemingly being stored in a public fashion since 2007.